I have to post this because there are so many searches looking for how to open Rar files with password protection. I cannot find a way to create .rar files with password but opening was not a problem at all.

First, make sure you have installed the unrar package. If not, visit this post for instructions.

Open the .rar file by double clicking on the file.

To open a protected file within the archive, double click it. A password dialog will pop-up.